In Yoga the union of Shiva-Shakti is seen as the union of Consciousness and energy. One cannot exist without another. It is a non-duality form and they are mirror images of each other, together they become an indestructible force.

Laya Yoga. Lord Shiva developed the concept of Laya Yoga as a means of attaining the ultimate aim of human life; union with the Cosmic Universe. Hindu religious teachings discuss the idea of spiritual enlightenment of human life.

noun. , Hinduism. the Godhead, of which the masculine, passive, transcendent, eternal principle is Shiva, and the feminine, active, immanent, temporal principle is Shakti, the Divine Mother.

Shiva shakti is the power of transformation and liberation in some yoga traditions. It is one of three main forces and is personified in the Hindu god, Shiva, the transformer and destroyer of evil; while the feminine shakti energy is represented by his consort, Parvati (sometimes referred to as Mahadevi).